anthony



T. P. ANTHONY.

MOLD DRYING PROCESS.

APPLICATION FILED NOV. 2. 191s.

{ 1 25,972. Patented Dec. 23, 191 9.

THOMAS P. ANTHONY, OF EDGEWATER PARK, NEW J ERSEY. ASSIGNOR TO UNITED ISTATES CAST IRON PIPE & FOUNDRY COMPANY, OF BURLINGTON, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

MOLD-DRYING PROCESS.

Application filed November 2, 1918.

To all whom it may concern:

Be it known that I, THOMAS. P. ANTHONY, a citizen of the United Statesof America, and resident of Edgewater Park, in the county of Burlingtonand State of New Jersey, have invented a certain new and usefulImprovement in Mold-Drying Processes, of-which the following is a trueand exact description, reference being had to the accompanying drawings,which form a part thereof.

My invention relates to the drying of pipe molds, and has for its objectto provide a rapid and eflicient method of drying the pipe molds, whichis especially well adapted for drying the molds in approximately theposition they are to occupy during the casting operation.

Essentially my invention consists in placing the mold flask, with itslining of undried mold, in a vertical position, closing thetop of themold and introducing burning gases into the bottom of the mold at somedistance from its sides, causing the burning gases to pass upwardthrough the central portion of the mold to its top, then downward alongthe sides of the mold to its bottom where ample space is left for itslateral escape.

By preference, the mold flask is arranged with its bell end downward andabove and at some distance from, but concentric with, the mold memberswhich coact with the bell in the assembled mold, so that the hot gaseswill escape from the mold flask between its bell end and the saidcoaeting mold members, with the result that all the parts of the moldare simultaneously dried.

Reference being now had to the drawings, which illustrate my invention,and certain convenient mechanical appliances for its practice, and inwhich Figure 1 is a vertical sectional elevation showing the mold flaskand coacting mold members together with the supporting mechanism and theappliances for introducing air and gas.

Fig. 2 is a similar section to Fig. 1, showing the mold membersassembled, the core in place, the casting completed, and the appliancesin the position they occupy during the casting operation, and

Fig. 3 is a plan view of the base of the structure shown in Figs. 1 and2.

A indicates the mold flask having a bell Specification of LettersPatent.

. mouth, as indicated at A.

Patented Dec. 23, 1919.

Serial No. 260,897.

B is the mold supported in the flask and having its bell mouth B. C isthe bottom plate of the mold having, as shown, a seat C for the annularsocket iron and a recess C to contain molding sand as indicated at D. Eis the annular socket iron, the outer face of which supports the moldingsand F, which coacts with the bell end B of the sand lining B to make upthe mold for the bell. G represents one of several separating blocks,which, during the drying of the mold, rest upon the bottom plate C andsupport the mold flask at some distance above it. By preference I formthese blocks with perforations as indicated at G, so that gases can passfreely through them as well as between them. H H represent what may becalled the legs of the stool or base. By preference I use four or sixsymmetrically disposed and continued upward in the form of supportingribs H, preferably formed with a series of concentric annular notches,as indicated at h, to fit different sizes of bottom plates C. The ribs Hand legs H are connected together by web plates H which slope graduallyoutward and upon which a layer of sand, held in place by projectionsindicated at I, is advantageously placed as shown in Fig. 1, as aprotection against runouts. H is an annular chamber supported, as shown,by the ribs H and fed with gas through a passage H and gas pipe J. Hindicates an annularly arranged system of gas burners extending upwardfrom the chamber H. K indicates the support for an annular deflectorindicated at K. The support is preferably cylindrical in form and madeso as to fit against a cylindrical inner face at the end of the chamberH It is provided, as shown, with depending legs K which, during thedrying oporation rest upon blocks L, as shown in Fig. 1, said blocksbeing removed and the cylinder and supported deflector brought to theposition shown in Fig. 2 during the casting operation. M is a coverplate which closes the upper end of the mold during the dryingoperation. N, Fig. 2, represents the core bar having trunnions asindicated at N and N For the drying operation the parts are assembled asshown in Fig. 1. Gas is fed to the annular system of burners anddirected upward against the baffie K, which forces it to move outwardinto the entering air current which passes freely through the spacebetween the bottom plate C and the web H The ignited air and gas passupward through the central portion of the mold, as indicated at O,turning outward at the top of the mold against the cover plate M, asindicated at O, and then pass downward as indicated at O in contact withthe molding sand to be dried, finally passing between the bell mouth Band the mold members F and D and outward between and through the spacingblocks G.

I have found that a good and eflicient circulation of the burning gasesis effected in this way, and that both the radiant and sensible heat ofthe gases is effectually used forthe drying of the molds.

In Fig. 2 I have found the parts in the position they occupy during thecasting operation, and it will be observed that the only changes inposition of the parts involved is the removal of the spacing blocks G,permitting the flask to rest upon the bottom plate C, and the removal ofthe supporting blocks L, which permits the cylinder K and deflector K toassume the position as shown. This will indicate an advantageous featureincident to the practice of my new method of drying molds in that itenables them to be dried approximately in the positions which theyoccupy during the casting operation.

Having now described my invention, what I claim as new and desire tosecure by Letters Patent, is:

1. The method of drying long open ended pipe molds consisting in placingthe mold in a vertical position, covering the top of the mold to preventescape of gases therethrough, introducing burning gases at the bottom ofthe mold at some distance from the sides thereof and providing an outletpassage for the gases in free communication with the outer periphery ofthe lower end of the mold, whereby said burning gases are caused to passupward through the central part to the top of the mold and downwardalong the sides of the mold to escape at the bottom thereof.

2. The method of drying long open ended pipe molds consisting insupporting the mold in a vertical position with its lower end in freelateral communication with the atmosphere, covering the top of the moldto prevent escape of gases therethrough, introducing burning gases atthe bottom of the mold at some distance from the sides thereof wherebysaid burning gases are caused to pass upward through the central part'tothe top of the mold and downward along the sides of the mold to escapelaterally at the bottom thereof.

3. The method of drying pipe molds, which consists in supporting themold flask vertically above and with its bell end at some distance fromand concentric with the mold members which coact with said bell end inthe assembled mold, covering the top of the mold, introducing burninggases at the bottom of the mold flask and at a distance from its innersides, whereby said burning gases are caused to pass upward to the topof the mold, downward along its inner sides, and out between thebell endof the flask and the said other mold members.

THOMAS P. ANTHONY.

